Production and High-Ratio Application of Iron Ore Pellets in Shougang

In order to reduce the fuel rate of blast furnace and promote green development, Shougang Jingtang Steel company has built two straight grate indurating machines with a productivity of 8 million tons of iron ore pellets. In this paper, the production technologies of self-fluxed pellets with hydrated lime were studied and the high-quality pellets were successfully produced on the indurating machine. Hydrated lime has a good binder property and decreases the amount of bentonite to obtain low silica pellet. The basicity is 1.15 and SiO₂ content is 2.0% in the pellet. The low-silica self-fluxed pellets were used in three large blast furnaces with 5500 m³ in Shougang Jingtang. The proportion of pellets in burden increased from 28 to 55%, slag rate of blast furnace decreased from 280 to 215 kg/tHM, and the fuel rate decreased from 500 to 480 kg/tHM.